kernel/rcu/Makefile - third_party/linux - Git at Google

 obj-y += update.o
 obj-$(CONFIG_SRCU) += srcu.o
 obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
 obj-$(CONFIG_TREE_RCU) += tree.o
 obj-$(CONFIG_PREEMPT_RCU) += tree.o
 obj-$(CONFIG_TREE_RCU_TRACE) += tree_trace.o
 obj-$(CONFIG_TINY_RCU) += tiny.o
	obj-y += update.o
	obj-$(CONFIG_SRCU) += srcu.o
	obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
	obj-$(CONFIG_TREE_RCU) += tree.o
	obj-$(CONFIG_PREEMPT_RCU) += tree.o
	obj-$(CONFIG_TREE_RCU_TRACE) += tree_trace.o
	obj-$(CONFIG_TINY_RCU) += tiny.o